From Eq. (REF ) we find that the critical exponent of the
system always takes the mean field value \(1/2\) . This result is
independent of the nonlinear parameter \(b\) . Also, it is clear that
\(\langle \mathcal {O}_{-} \rangle \)  is zero at \(T = T_{c}\)  and
condensation occurs for \(T < T_{c}\) . In table 3, we present the
condensation values \(\gamma \)  obtained for a \((2+1)\) -dimensional
holographic superconductor, by the analytical SL method for both
BI and EN electrodynamics and for different values of the
nonlinear parameter \(b\)  Again, the analytical results for BI case
are taken from [1]}. In both cases, we observe that the
condensation value \(\gamma \)  increases with increasing the
nonlinear parameter \(b\) . This indicates that the higher nonlinear
electrodynamics corrections to the gauge field make the
condensation to be formed harder. On the other hand, comparing
these two types nonlinear electrodynamics, we find that the
condensation operator for the EN is larger than that of BI which
means that the EN electrodynamics makes the condensation harder
with respect to the BI nonlinear electrodynamics.
<TABLE>